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Response of monocotyledons to HOE 22870 and HOE 23408



Response of monocotyledons to HOE 22870 and HOE 23408



Weed Science 24(3): 266-269



In the greenhouse, postemergence treatments of 1.12 kg/ha of HOE 22870 [4-(4'-chlorophenoxy)-phenoxy-.alpha.-propionic-isobutylester] or HOE 23408 methyl 2-[4-(2,4-cichlorophenoxy) phenoxy] propanoate were applied to 3 perennial weeds (2 grasses and 1 sedge) and to 27 spp. or varieties or annual grasses (crops and weeds). The perennials were resistant to both compounds, but control of seedling grasses ranged 0-100%, indicating the potential of controlling certain grass weeds in certain grass crops and in broadleaf crops. The response of a given species was similar for both compounds. On some grasses 1 compound was considerably more effective than the other. Seven species or varieties of foxtail (Setaria spp.) were treated with various rates of either compound. Differential responses were observed, but it appeared that all the foxtail species or varieties studied should probably be controllable with HOE 23408. All buy yellow foxtail [S. lutescens (Weigel) Hubb.], should probably be controllable with HOE 22870.

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Accession: 000485754

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DOI: 10.2307/4042873



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